Is the Champion 3X still recommended with a 5.5 head

[oldbike99]

My motor is a fresh re-build with a "B" cam and 5.5 head. I am asking for a spark plug recommendation. Thank you in advance.
Paul

[J Franklin]

Sure, use them, they'll run real well, I use them with a Brumfield head at .025 gap

[Ron in Quincy]

I have the same combination except I have insert main and rod bearings, counter balanced crankshaft, lightened flywheel, V8 clutch, and I run 3X sparkplugs. I gap my plugs at 30 instead of 35 because of the 5.5 high compression head.

Ron

[Mitch//pa]

not only do they look proper but will perform nicely also..

[marc silva]

I am about to put a Snyder 5.5 head on a fresh stock re-build. I just bought a set of 3x's I thought the wider the gap the bigger the spark was better. A higher compression works better with a closer gap?

[Tom Wesenberg]

Sponsored Links (Register now to hide all advertisements)

More compression takes more voltage to jump the gap..025" to .030" should work fine.

[AL in NY]

I have a Brumfield 5.9 head, Stipe IB330 cam, "B" carb and manifold and the stock Champion 3X plugs work great.

[Anteek29]

Originally Posted by Ron in Quincy

I have the same combination except I have insert main and rod bearings, counter balanced crankshaft, lightened flywheel, V8 clutch, and I run 3X sparkplugs. I gap my plugs at 30 instead of 35 because of the 5.5 high compression head.

Ron

Same here.

[31 Vicky]

Marc,

Like your avatar...

With a good ignition 0.035 should be reasonable, on the 7:1 Lion I use 0.037

A's Always
Dave

[kenparker]

The blue coupe in the avatar has a Brumfield 5.9 and a "B" cam. Stock Z-1 carb. She run - and idles - beautifully. Plugs set at .030 and points set at .020 and gap in distributor set at .025. All three gaps have to work together.

[Ron in Quincy]

Ken,

Thanks for mentioning the gap between the rotor and the contacts in the distributor housing; this is a very important gap which is often overlooked, even with a stock engine.

Ron

[pgerhardt]

Originally Posted by Ron in Quincy

Ken,

Thanks for mentioning the gap between the rotor and the contacts in the distributor housing; this is a very important gap which is often overlooked, even with a stock engine.

Ron

How do you adjust the rotor to contact points gap in the distributor body?

[Fred S]

You bend or file the brass rotor tab, and check the space between it and the contacts with a feeler gauge.

[Ron in Quincy]

Sometimes it is necessary to dress the tab or tabs in the upper housing; have found them badly worn from past usage where the gap was not checked prior to usage.

Ron